Irrigation sprinkler



FIG. 1 is a front elevation of an irrigation spinkler, showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a rear elevation thereof;

FIG. 5 is an elevation of the right side thereof; and

FIG. 6 is an elevation of the left side thereof. 

The ornamental design for an irrigation sprinkler, as shown. 